Name a specific field, besides civil engineering, that transportation engineering works closely with for city design.

The specific field that transportation engineering works closely with for city design, besides civil engineering, is Urban Planning. Urban Planning is the professional discipline focused on the design, arrangement, and management of human settlements. It involves guiding the orderly development of cities, towns, and regions by considering factors such as land use, infrastructure, economic development, environmental protection, and social well-being. Transportation engineering designs and manages the systems that facilitate the movement of people and goods, including roads, public transit, and pedestrian facilities. These two fields are intrinsically linked in city design because the physical layout of a city, determined by urban planners through land-use patterns, directly influences the demand for and design of transportation infrastructure. For example, urban planners designate areas for residential, commercial, or industrial use, which dictates where people live, work, and shop. Transportation engineers then collaborate to design the optimal transportation networks, such as street grids, highway systems, or public transit lines, to efficiently connect these designated areas. This ensures that the transportation system adequately serves the planned land uses and supports the city's overall form and function. Conversely, proposed transportation projects, like a new transit line, can significantly influence future urban development patterns, leading urban planners to create policies for areas like transit-oriented development, where mixed-use, high-density growth is encouraged around transit stations.